The TB310 gas powered mower is designed with a 163cc engine that provides durability and makes yardwork easy! The rear-wheel drive helps power the mower over rugged terrain. The self-propelled drive allows for easy push and maneuverability. A large 2.3-bushel rear bag is designed to minimize the time spent emptying the grass clippings. Dual-lever height adjusters are conveniently located near the wheels to adjust the cutting height between 1.25″ 3.75″ quickly. 21″ STEEL DECK made from heavy gauge steel allows for durability REAR WHEEL DRIVE with a dual-lever, variable speed transmission is designed for traction and control over rugged and hilly terrain POWERFUL ENGINE: 163cc engine featuring easy starting, no priming, and long life. MOWING CONVENIENCE: 21 inch, 3-in-1 convertible deck lets you side discharge, mulch or rear bag grass clippings LARGE CAPACITY BAGGING: Rear bag collects 2.3 Bushel grass clippings for easy clean up or composting HEIGHT ADJUSTMENT: Dual-lever, 6 position height adjustment makes it easy to change cutting heights from 1.25-in to 3.75-in high